How are implementors of ACTA going to differentiate between non-pirated material and pirated material without snooping on what is being shared as it’s being shared (via a man-in-the-middle attack)?

In principle, ACTA requires snooping to ensure that pirated material is not being shared.

“ACTA does not restrict freedom of the internet. ACTA will not censor or shut down websites.”

It will aid the shutting down of (for example) file sharing websites that are merely alleged to contain pirated material.

“ACTA is not about how we use the internet in our everyday lives.”

It is exactly about that. ACTA aims to modify the internet behaviour.of those citizens covered by it.

“Computers, iPads or iPhones will not be checked or monitored – ACTA is not Big Brother.”

How will they search for pirated material on Computers, iPads, iPhones, etc if they or communications between said devices are not checked/monitored? The answer is that Computers, iPads, iPhones, etc can (indeed, must) be checked/monitored to ensure they have no pirated material on them. Without checking/searching Computers, iPads, iPhones, etc, authorities cannot know whether they contain pirated material?

They can’t find pirated material without checking Computers, iPads, iPhones, etc or communications between said devices for pirated material!